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Updated: Jun 17, 2025
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Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
Published on: October 23, 2018
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Electron-injection-engineering induced dual-phase MoO2.8F0.2/MoO2.4F0.6 heterostructure for magnesium storage
Weixiao Wang1, Fangyu Xiong1, Shaohua Zhu1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
National Science Review
|August 12, 2024
Summary
Researchers developed a novel dual-phase molybdenum oxide fluoride heterostructure to enhance magnesium-ion diffusion kinetics in rechargeable magnesium batteries (RMBs). This breakthrough significantly boosts battery performance and safety for advanced energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Rechargeable magnesium batteries (RMBs) offer high volumetric capacity and safety.
- Sluggish Mg2+ diffusion in host lattices limits RMB performance.
Purpose of the Study:
- To develop a strategy for accelerating Mg2+ diffusion in RMBs.
- To fabricate a dual-phase MoO2.8F0.2/MoO2.4F0.6 heterostructure for improved RMB performance.
Main Methods:
- Electron injection strategy to modulate Mo 4d-orbital splitting.
- Fabrication of a dual-phase MoO2.8F0.2/MoO2.4F0.6 heterostructure.
- Analysis of phase transition and its effect on electronic and ionic properties.
Main Results:
- Electron injection induced a phase transition from orthorhombic MoO2.8F0.2 to cubic MoO2.4F0.6.
- The heterostructure generated a built-in electric field, enhancing conductivity and ionic diffusivity.
- Achieved a reversible capacity of 172.5 mAh g-1 at 0.1 A g-1 in a MoO2.8F0.2/MoO2.4F0.6//Mg full cell.
Conclusions:
- Orbital-scale manipulation via electron injection is effective for high-performance RMBs.
- The dual-phase heterostructure significantly improves Mg2+ diffusion kinetics.
- This work paves the way for advanced RMB development.
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